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Title: Studying Avalanches in the ground-state of the two-dimensional random field Ising model driven by an external field
Author: Frontera Beccaria, Carlos
Vives i Santa-Eulàlia, Eduard
Keywords: Física estadística
Sistemes dinàmics diferenciables
Equacions d'estat
Transformacions de fase (Física estadística)
Statistical physics
Differentiable dynamical systems
Equations of state
Phase transformations (Statistical physics)
Issue Date: 2000
Publisher: The American Physical Society
Abstract: We study the exact ground state of the two-dimensional random-field Ising model as a function of both the external applied field B and the standard deviation ¿ of the Gaussian random-field distribution. The equilibrium evolution of the magnetization consists in a sequence of discrete jumps. These are very similar to the avalanche behavior found in the out-of-equilibrium version of the same model with local relaxation dynamics. We compare the statistical distributions of magnetization jumps and find that both exhibit power-law behavior for the same value of ¿. The corresponding exponents are compared.
Note: Reproducció del document publicat a:
It is part of: Physical Review E, 2000, vol. 62, núm. 5, p. 7470-7473
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ISSN: 1539-3755
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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